DRF aka Thrifty Bill
Join Date: Jan 2008
Location: The NC Mountains
Bikes: 86 Katakura Silk, 87 Prologue, 87 Cimarron, 14 frame school custom, 73 Paramount
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+1 Tape measure.
Many manufacturers (Trek for example), use a removable decal for the sizing, so on used Treks, its often long gone. Sometimes you will find the frame size cast into the bottom bracket shell, but not very often.
If you are comparing with other bikes, just realize some manufacturers measure it differently: center to center, center to top, etc. And in the used bike market (Craigs List for example), most sellers either don't own a tape measure, or can't read one, as I rarely see a bike on C/L with the size accurate. I buy one one or two used bikes a week, so I see a lot of used bikes. Bought two bikes this week, seller stated they were the same size. Actually, one was a 52cm, the other a 56cm. 4 cm is over 1 1/2 inches, so even a yardstick could tell the difference.
Last edited by wrk101; 10-03-10 at 06:54 AM.